“…In order to capture a significant amount of light, commonly used materials for QD sensitizers are CdTe [249], PbSe [250], InP [251], ZnSe [252], CdS, CdSe [253], PbS [254,255], Ag 2 S [256], Bi 2 S 3 [257], CuInS 2 [258], InAs [259], and CuBiS 2 [260]. Furthermore, combinations of different QDs, such as Cd 1-x Zn x ZTe/CdS [261], Ag 2 S/ZnS [262], Bi 2 S 3 /Sb 2 S 3 [263], CdTe/CdTeSe/CdSe [264], CdS/PbS [253,265], CdS/CdSe [253,266], CdS/CdTe [267], and InP/ZnS [268] have shown impressive performance for the light absorption purposes. In order to obtain an efficient solar cell, different research groups used different types of QD sensitizers, mostly with TiO 2 -based photoanodes, with the recorded efficiencies listed in Table 7.…”